Question about 2002 Pontiac Grand Am

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2002 pontiac grand am engine light comes on shortly after driving but goes off if you turn the car off then later start it back up car runs great though 82000 miles

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The only way to know what is causing it is to have the computer scanned to see what code is causing the light to come on. Even if the light goes out the code should still be stored in the computers memory. Once you know the code post it and I can help you further.

Posted on Oct 17, 2010


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This may be totally off base but my 2002 Lesabre with the 3.8 litre engine was running like this and it was the ignition control module. It is under the coil packs. The engine would start ok and idle ok but run like heck when trying to drive it. Are you getting any codes? Mine was random misfiring. The ignition module was about $150 and relatively easy to replace. Make sure everything is clean when it goes back together.

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Check the fuel pressure regulator. Pull off the vac line to it and see if any gas is leaking out of the vacuum fitting. If you see any fuel replace the regulator.

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Replace the temp sensor/switch located on the radiator.  Don't forget to drain your radiator and use teflon tape on the sensor when installing it.  DO NOT over-tighten.

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